Creating SALES ORDER with custom fields using SOAP

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Hi All

I'm facing an issue while trying to create an Order using SOAP Webservice. In my SALES ORDER Table, I do have custom field that I want to send through SOAP. Unfortunately, it's not working when I pass the custom fields in the SOAP object. But the order get created when I send without the custom fields.

Is there any specific configuration to be done?

Thanks for the reply